Update: Our reader Hossein reports that after a number of upgrades, Windows 10 can forget the original installation date.

You can extract the installation date directly using a combination of the systeminfo app and the findstr toolĮnter the following at the command prompt: systeminfo|findstr /B 'Original'

In the output, you can find the line 'Original Install Date':

Open an elevated command prompt instance.To find your Windows installation date, do the following: The installation date is also included in the output of that little tool. One of them, called systeminfo.exe, can provide detailed information about your OS and its configuration. While Windows is designed to be operated with a graphical user interface, under the hood of the operating system is a suite of handy command line tools. It is possible to get this using only the built-in Windows tools. To get this information, you don't need any third party tools. There are times when you may need to determine when exactly Windows 10 was installed on your PC. RECOMMENDED: Click here to fix Windows issues and optimize system performance